21 citations · 70 across the 13 of their papers we have counts for
14 papers
Tuning nonlinear waves in nonreciprocal active filaments
Sami C. Al-Izzi, Jack Binysh, Yao Du +2
The instabilities of slender structures power biological locomotion across scales, and offer a compelling method to actuate soft robots. Nonreciprocal elastic solids have been foun…
Capillarity Reveals the Role of Capsid Geometry in HIV Nuclear Translocation
Alex W. Brown, Sami C. Al-Izzi, Jack L. Parker +4
The protective capsid encasing the genetic material of Human Immunodeficiency Virus (HIV) has been shown to traverse the nuclear pore complex (NPC) intact, despite exceeding the pa…
Nonreciprocal buckling makes active filaments polyfunctional
Sami C. Al-Izzi, Yao Du, Jonas Veenstra +5
Active filaments are a workhorse for propulsion and actuation across biology, soft robotics and mechanical metamaterials. However, artificial active rods suffer from limited robust…
Membrane tubes with active pumping: water transport, vacuole formation and osmoregulation
Sami C. Al-Izzi, Matthew S. Turner, Pierre Sens
The need for organisms to regulate their volume and osmolarity when surrounded by freshwater is a basic physical challenge for many bacteria, protists and algae. Taking inspiration…
Gauge Freedom and Objective Rates in the Morphodynamics of Fluid Deformable Surfaces: the Jaumann Rate vs. the Material Derivative
Joseph Pollard, Sami Al-Izzi, Richard G. Morris
Morphodynamic descriptions of fluid deformable surfaces are relevant for a range of biological and soft matter phenomena, spanning materials that can be passive or active, as well…
Advecting Scaffolds: Controlling The Remodelling Of Actomyosin With Anillin
Denni Currin-Ross, Sami C. Al-Izzi, Ivar Noordstra +2
We propose and analyse an active hydrodynamic theory that characterises the effects of the scaffold protein anillin. Anillin is found at major sites of cortical activity, such as a…
A Twist On Active Membranes: Odd Mechanics, Spontaneous Flows and Shape Instabilities
Sami C. Al-Izzi, Gareth P. Alexander
Living systems are chiral on multiple scales, from constituent biopolymers to large scale morphology, and their active mechanics is both driven by chiral components and serves to g…
Morphodynamics of Active Nematic Fluid Surfaces
Sami C. Al-Izzi, Richard G. Morris
Morphodynamic equations governing the behaviour of active nematic fluids on deformable curved surfaces are constructed in the large deformation limit. Emphasis is placed on the for…
More ATP Does Not Equal More Contractility: Power And Remodelling In Reconstituted Actomyosin
Sami C. Al-Izzi, Sedigheh Ghanbarzadeh Nodehi, Darius V. Köster +1
The cytoskeletal component actomyosin is a canonical example of active matter since the powerstroke cycle locally converts chemical energy in the form of adenoside triphosphate (AT…
Active Flows and Deformable Surfaces in Development
Sami C. Al-Izzi, Richard G. Morris
We review progress in active hydrodynamic descriptions of flowing media on curved and deformable manifolds: the state-of-the-art in continuum descriptions of single-layers of epith…
Dynamics of passive and active membrane tubes
Sami C. Al-Izzi, Pierre Sens, Matthew S. Turner +1
Utilising Onsager's variational formulation, we derive dynamical equations for the relaxation of a fluid membrane tube in the limit of small deformation, allowing for a contrast of…
Measuring Gaussian rigidity using curved substrates
Piermarco Fonda, Sami C. Al-Izzi, Luca Giomi +1
The Gaussian (saddle splay) rigidity of fluid membranes controls their equilibrium topology but is notoriously difficult to measure. In lipid mixtures, typical of living cells, lin…
Shear-driven instabilities of membrane tubes and dynamin-induced scission
Sami C. Al-Izzi, Pierre Sens, Matthew S. Turner
Motivated by the mechanics of dynamin-mediated membrane tube fission we analyse the stability of fluid membrane tubes subjected to shear flow in azimuthal direction. We find a nove…
Hydro-osmotic instabilities in active membrane tubes
Sami C. Al-Izzi, George Rowlands, Pierre Sens +1
We study a membrane tube with unidirectional ion pumps driving an osmotic pressure difference. A pressure driven peristaltic instability is identified, qualitatively distinct from…